Refractor bowl



June 3, 1930.' f

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Patented June 3, 1930 Y UNITED STATES PATENT' f brace- GEORGE E. COLE,or MILWAUKEE, wrscoiisrn, AssIGEoE, EYfMEsivEf'AssIGNMENTa To LINEMATERIAL COMPANY, or soUrHMILwAn-KEE, WISCONSIN, A Conroaa-4M TION FDELAWARE EEERACTOE BOWL Application filed July 5, 192s. serial No.290,466.

This invention relates particularly to the formation of the surface ofrefra'ctor bowls y and the like and has as anobject to provide arefractor having a substantially diamond Q6 shaped, raised pattern withvintersecting veins or grooves which provide a direct path for rainfalling on the refractor and thus reduce the surface resistance of therefractor bowl to a minimum.

10 Another object of this invention resides in the provision of animproved refractor bowlA having its surface so formed that the raysoflight are diffused in four diifcrentldirections and thus the intensebrightness of the lamp filament reduced. y

And a further Vobject of this invention'resides in the provision of animproved refractor having a raised diamond'shaped pattern which issymmetrical with the vertical axis of the bowl and with any horizontalplane through the bowl.

With the above and other objects in viewV which will appear as thedescription proceeds, my invention resides in the novel construction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly defined by the appended claims, it beingunderstood that such changes in the precisejembodiment of thehereindisclosed invent-ion .may be made as come within the scope of theclaims.

In the accompanying drawing, I have il` lustrated one complete exampleofthe physical embodiment of my inventionA constructed according to thebest mode I have `so far devised for the practicalv application of theprinciples thereof, and in which:

Figure 1 is a side, elevational viewrof a refractor bowl embodying myinvention; 40 i refractor in detail; Y Y

Figure 3 is a cross-sectional view taken through Figure 2 on the planeof the line 3*'3;and y VFigure 4C is a transverse, sectional view, takenthroughFigure 2 on the plane of the line 4 4. y Y I Referring now moreparticularly to the .50 accompanying drawing,vinV which likeV nu-Vbrightness of the Figure 2 is an enlarged, fragmentary, ele-YV vationalview illustrating the surface of the merals designate like partsthroughout the several views, 5 designates a refractor bowl which mayhave any desired contour, having an upper lflange 6 by which the bowlmay be attached to its'holding means, notshown. The surface of therefractor is Vformed of a multiplicity of substantially diamond shapedpyramids 7 being formed by intersecting V-shaped grooves 8. The pyramidshaped configurations are varranged leo symmetrically about the bowlandare ta'- pered to conform to the contour thereof which in the presentinstance is substantially inverted cone shape, the pyramids adjacent thetop Vof the bowl beingpropor'tionately larger than thoseadjacent thebottom thereof.

As'illustrated yin Figures '3 and 4, the thickness of the glass isuniform throughout so that the inner surface of the -bowl is shaped tocorrespond with the outer surface,

vthe trangular shaped flat faces 9V of the pyramids on either side ofthe glass being `rfrom top-to the bottom of thev refractor bowl formpaths for therain striking the refractor and thus'reduce the surfaceresistance to a minimum and permit the rain to wash the outerk surfacemost advantageously.

; What I claim as my invention is:

l'. A refractor bowl formed of glass of equal Lthickness throughout andhaving its surface composed of a multiplicity of substantially Ydiamondshaped pyramids ar-fV ranged :with'their majoraxes substantially eo 'Yvertical and wherebythe rays of light are Y Y broken up and theresistance of the outer surface of the bowl to r'ain is considerablyreduced.

ice ff 2. A refraotor bowl formed of glass of equal thickness throughoutand having its surface composed of a multiplicity of sub- Y stantiallydiamond shaped pyramids form- 5 ing intersecting oblique grooves,whereby the rays of the flight are broken up and the resistance of theouter surface of the bowl to rain is materially reduced.

In testimony whereof I hereunto aiix my

